Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb37c03a3356a99…

MALICIOUS

PDF

78.4 KB Created: 2021-02-11 01:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b17e17701f1ddaf1d03af2a2dcc9eb6e SHA-1: 08f1fc50f182ce945ba7762c0e0c531120e40b2f SHA-256: adb37c03a3356a99c0e54a1d974f21a232a299de113137a4a1060a36b5022d5d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/123?utm_term=hide+my+ip+cracked In PDF document text
    • http://salonvarna.com/bajolibitef4z43.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/nggPrgf/battery_daddy_home_depot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475217/normal_5ff06cf334a6f.pdfIn PDF document text
    • https://cdn.sqhk.co/lekaguko/igjxifr/smart_iphone_charger_cable.pdfIn PDF document text
    • https://mizevazorabij.weebly.com/uploads/1/3/5/3/135347525/6064926.pdfIn PDF document text
    • http://takipleskazan.org/88442674515pssbp.pdfIn PDF document text
    • https://kobivepetere.weebly.com/uploads/1/3/1/8/131871499/kilewelejeni-bilefuferum.pdfIn PDF document text
    • https://jiliwadikejupa.weebly.com/uploads/1/3/1/3/131379685/zejaxaruv.pdfIn PDF document text
    • https://cdn.sqhk.co/daxutoxod/FgfjjdP/80s_anime_iphone_wallpaper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/moduxanakuri/film_3_dara_full_movie_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/best_wordpress_portfolio_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/61483350831.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/frozen_full_movie_in_tamilyogi.pdfIn PDF document text
    • http://bopefurolo.rf.gd/nidojose.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/10_piece_jigsaw_puzzle_template_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF78 4628 bytes
SHA-256: cb338e0bd2211e46d5a8d5fc530097d6b03ac322f7c12f662b176b8d2258facd
font_01_sfnt_off0000df26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF26 10636 bytes
SHA-256: 6c2161ce2e12fc93ae4dc9ffff6fb4cc3044e42037305ad861871c18d7e04160
font_02_sfnt_off0001039d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039D 17908 bytes
SHA-256: 810c2e4940c8bc459aa53dbb389ad8de857b9415218a6c0ecbee16059673c2c9
font_03_sfnt_off00011e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E90 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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